Valve control system

Details Valve control system Valve control system

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/38 (2006.01) F16K 7/17 (2006.01) F16K 31/365 (2006.01) F16K 31/385 (2006.01) F16K 47/02 (2006.01)

Patent

CA 2282037

A fluid control valve has a valve member which, on closing creates a stagnation zone between the valve member and a surface within the valve. In the stagnation zone fluid pressure is greater than it is in an adjacent constriction zone. This causes the valve to close slowly, thereby reducing the likelihood that water hammer will occur on closure of the valve. The design of the valve member also reduces resonances which can cause annoying noises and premature wear. A flow restriction chamber further slows closure of the valve. The fluid control valve may be controlled by a conventional 3-way pilot valve. Preferably the fluid control valve is used with a pilot valve according to the invention having a rocker member which, on actuation, first closes an inlet valve member and then opens an outlet valve member. The pilot valve may be used in other situations where a 3-way valve is needed.

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